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    <meta charset="UTF-8">
    <title>HTML基础</title>
    <script src="app.js"></script>
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<body>
    <h1>标题</h1>
    <h2>标题</h2>
    <h3>标题</h3>
    <h4>标题</h4>
    <h5>标题</h5>
    <h6>标题</h6>
    <p>apple</p>
    <a href="www.baidu.com">学习的家园</a>
<img src="1.png">
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